Thomas Midgeley Jr. discovered that adding tetraethyl lead to gasoline reduced knocking in automobile engines.
21st June 1919: The German High Seas naval fleet is scuttled at Scapa Flow
21st June 2019
Thomas Midgeley Jr. discovered that adding tetraethyl lead to gasoline reduced knocking in automobile engines.
28th June 2015
11th November 2025
11th November 2025
1st September 2018
9th November 2019